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Finding the Fourth Proportional to 627.36, 865.78 and 347.60

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Solution

The fourth proportional to 627.36, 865.78 and 347.60 is: 479.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.36 : 865.78 = 347.60 : x
  2. Step 2: Convert to fraction form
    627.36/865.78 = 347.60/x
  3. Step 3: Cross multiply
    627.36x = 865.78 × 347.60
  4. Step 4: Simplify right side
    627.36x = 300,949.35
  5. Step 5: Solve for x
    x = 300,949.35/627.36
  6. Step 6: Final answer
    x = 479.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.